Cornice release above the headwaters of storm castle creek which triggered a slab, east facing aspect. Looked to be several feet deep and ran a long way.
Snow Observation Source
Avalanche Details: Cornice Fall Wind Slab Avalanche in Storm Castle Creek
Forecast link: GNFAC Avalanche Forecast for Thu Feb 27, 2025
Northern Gallatin, 2025-02-27
Forecast link: GNFAC Avalanche Forecast for Thu Feb 27, 2025